Yhe CTS-V calipers are made by Brembo. We have not had track time to measure stopping distance. Spring and track time are near. Subjectively there seems be a significant improvement. We'll find out soon enough.

Which Brembo system did SLP use?

On the SLP Performance web site, there is a Motor Week Video testing of their ZL575. The car had the 'upgraded Brembo GT Brake package' which had a 0-60 stopping distance of 110 Ft. I thought this was pretty close to the stock SS stopping distance.